Accounts PayableHarbor & Co. · demo
Supplier invoices read from email, matched to the PO and receipt, routed for approval and posted to QuickBooks.
Rommel Mateo Jr. · Software Developer
I make your tools work as one system.
Your CRM, accounting, payments and store, connected with tested code and monitored after launch. 2 years building web apps, APIs and automations.
2 yearsbuilding software
8 sample workswith walkthroughs
44 toolsacross the stack
Selected work
Systems and stores I worked on at Velnore
Built with the Velnore team. My part: the integrations, APIs and internal tools, and the tests and monitoring that keep them running.
Back-office systems
5 systems
CRM and Accounting SyncHarbor & Co. · demo
Keeps HubSpot and QuickBooks in agreement, routes real conflicts to the right person and recovers from outages.
Accounts ReceivableHarbor & Co. · demo
Matches bank deposits and Stripe payouts to open invoices, runs collections and forecasts cash.
Operations AgentHarbor & Co. · demo
An AI assistant for routine office requests. Anything final becomes a proposal a person approves.
Carrier Onboarding and Document IntakeCrosswind Logistics · demo
Vets new carriers and pays them only when the paperwork is right.
The systems run for demo companies on synthetic data. Every company, person and record in them is made up.
Shopify stores
3 stores
HalwardClothing label · password demo
Quiet-luxury clothing, with fit notes and a size guide on every garment.
Brackwater StudioMade-to-order furniture · password demo
Furniture built to order: pick the size, fabric and legs, or order free samples.
Tallow Hill Coffee RoastersCoffee roaster · password demo
Coffee for home and for cafés, with wholesale accounts at their own prices.
Fictional brands on Shopify development stores, which always keep a storefront password. It's “demo”.
Stack
What I work with
TypeScript and Node.js most days, with the databases, clouds and business tools each project needs.
Frontend
- TypeScript
- Vue
- Nuxt
- React
- Next.js
- Tailwind CSS
- Vite
Backend
- Node.js
- Fastify
- NestJS
- Express
- Python
- FastAPI
Mobile
- React Native
- Expo
Databases
- PostgreSQL
- MySQL
- Redis
- SQLite
- Supabase
- Firebase
APIs and integrations
- REST
- GraphQL
- Webhooks
- HubSpot
- QuickBooks
- Stripe
- Slack
Cloud and DevOps
- Docker
- Google Cloud
- AWS
- Cloudflare
- Vercel
- GitHub Actions
Automation and AI
- n8n
- Zapier
- Make
- Claude API
- OpenAI API
E-commerce
- Shopify
- Liquid
Testing and monitoring
- Playwright
- Vitest
- Sentry
Experience
2 years building software
CurrentVelnore
Developer, Velnore
A small studio that automates the back office for service businesses and keeps it running.
- Integrations between CRMs, accounting, payments and e-commerce: HubSpot, QuickBooks, Stripe and Shopify.
- APIs and internal tools for finance and operations teams: payables, receivables and carrier onboarding.
- AI features where a person approves anything final, with a full audit trail.
- The tests and monitoring that keep each system running after handover.
Contact
Have something to build or connect?
Email is best. I usually reply within a working day.
rommel@velnore.dev